#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
void swap(int* x, int* y)
{
	int tmp = *x;
	*x = *y;
	*y = tmp;

}




int main()
{
	int num1 = 1;
	int num2 = 2;

	swap(&num1, &num2);
	printf("%d %d", num1, num2);


	return 0;
}